Malicious PDF — malware analysis report

Static analysis result for SHA-256 b05287260c89b501…

MALICIOUS

PDF

46.1 KB Created: 2020-10-25 17:04:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 50ff1fd6b43883308dd9f878bff66aee SHA-1: 9f42ee16ba29ae0ff0a4167c51f991b3df8edcac SHA-256: b05287260c89b50170ef3e321c45d097385a21a0a3c0614420fc507eb0092b19
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm and a redirector URL, indicating a likely attempt to distribute malicious content or engage in SEO spam. The embedded URLs, such as 'https://ggtraff.ru/aws?keyword=bikhre+moti+book+in+urdu+pdf+free+download', are designed to lead users to further malicious sites. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ggtraff.ru/aws?keyword=bikhre+moti+book+in+urdu+pdf+free+download In PDF document text
    • https://lubukapilibuvi.weebly.com/uploads/1/3/4/0/134095968/mowupobi.pdfIn PDF document text
    • https://sifizebutu.weebly.com/uploads/1/3/0/8/130814914/59e8e85a52.pdfIn PDF document text
    • https://gomemetunugup.weebly.com/uploads/1/3/2/7/132712315/4797947.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384026/normal_5f8dc64f32c11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376098/normal_5f8ff09100310.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379474/normal_5f8c91dca698b.pdfIn PDF document text
    • https://jonipafatanepa.weebly.com/uploads/1/3/2/7/132741476/de5e6decdc89.pdfIn PDF document text
    • https://dudikojegak.weebly.com/uploads/1/3/1/4/131406444/041bbb613585df5.pdfIn PDF document text
    • https://lowizozexide.weebly.com/uploads/1/3/0/7/130776176/2211827.pdfIn PDF document text
    • https://likixulojuxe.weebly.com/uploads/1/3/4/3/134386003/dakuradejo_jiwiwugotonu_mopowaz_warej.pdfIn PDF document text
    • https://sofivowipaduru.weebly.com/uploads/1/3/4/4/134454637/6486d08.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wilugugo/29487120383.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/history_of_india_gate_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/dulce_et_decorum_est_analysis_essay.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/dafovowovagipogujukatoko.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/boolean_search_techniques.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/jikitesegeletuzososokin.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/programme_pour_apprendre_le_franais.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/thirsty_crow_story_in.pdfIn PDF document text
    • https://s3.amazonaws.com/golepe/mawifowave.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000055f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55F2 5448 bytes
SHA-256: 9ecd95cf22aea7f941dd4ddd6ac0de31fc62179b2c9a1191f62406ac159281bb
font_01_sfnt_off00006859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6859 10600 bytes
SHA-256: 1efc0dca30b4ae61dc4406c78359be39d6df9242d53ebd6c709a52844d690190
font_02_sfnt_off00008bac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BAC 19360 bytes
SHA-256: 57122a3937a633567f1f1c596f1bd96a8e86908be183d5636e7a59c8b6374061

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